Lot Essay
The Amsterdam van Keulen family were heavily involved in world trade through both the Dutch East and West Indies Companies, and became known as cartographers active between about 1680 and 1822. Johannes was registered in the Amsterdam Booksellers Guild and purchased a building in Amsterdam for the purpose of creating sea-charts, atlases and associated material. His shop was located at the 'Nieuwenbrug' and bore the symbolic name De Gekroonde Lootsman, THE CROWNED PILOT. Johannes gained extensive knowledge of maps and sea travel and was assisted by the mathematics-surveyor Claes Janz Vooght. Their close relationship resulted in the famed Sea Atlas ZeeAtlas, 5 volumes (first edition 1680) and the Sea pilotbook, Nieuwe Groote Lightende Zeefakkel, 5 volumes were published between 1678 and 1684. The Zeefakkel was diversificated by Gerard van Keulen, son of Johannes, who took over from his father in 1714. Gerard had been well educated in technical and scientific skills and added numerous details, such as the riverways, mountains and isles.